How mobile credit card readers work it works

The latest mobile credit card readers are generally smaller than a matchbox. They don’t rely on a wall connection to a telephone line or a power point. The reader is typically a small jack plugged into the headphone input of a smartphone, through which a card can be swiped, tapped or inserted. The mobile point of sale terminal can be created with little more than a smartphone, the card reading jack, and occasionally an app provided by the host bank or payment processor.